What briefer life than Solomon Grundy's?
Describing the events of 1929.
Written, in his characteristic style, while Swinburne was rusticated in 1859-60.
The clue represents a pause.
The book is by Auden and MacNiece, but Auden wrote this part.
The clue is simply a better known quotation from the same author.
Leopardi are, unsurprisingly, leopards.
The clue mentions a Metro station suggested by the name of one of the characters.
Zweig did indeed live in Bath for a time.
This is from the introduction to the book, which is subtitled The Radical.